GeoGraffiti on iPhone Great for Espionage
GeoGraffiti is a geolocation service that centers on little voice notes users can leave all over the world. Before having a native iPhone application it was a voice service you could call into and leave a note that would be associated with whatever ZIP code or telephone number entered through your phone's keypad. It wasn't the most exact system, and to remedy that parent company Slingpost has been working on a native iPhone application that makes use of the handset's GPS to make the voice notes a little more precise. These are the same voicemarks that have been created on phones as well as on an accompanying Google Maps mashup. The app does not make the distinction as to which platform they originate from.
This app reminds me of some of the local note applications that I've seen getting buzz on the app store (see Graffitio, NearPics, and Zintin). There's a certain human fascination with scribbled graffiti and notes written in guest books. This is a smart play on that. I wouldn't be surprised to see people take advantage of something like this to create their own scavenger hunt or to leave messages for friends, making it a platform of its own. Adding some things like special password-protected drop boxes or easter eggs would definitely take it to the next level.